【摘要】 高填方渠堤沉降问题直接影响引调水工程的正常运行和供水安全。等值反磁通瞬变电磁法（简称OCTEM）因其浅层探测盲区小、分辨率高、检测效率高、地层分层能力较强等优势，目前在浅层地球物理勘探领域得到了广泛应用。针对南水北调中线焦作高填方渠段沉降加速问题，运用等值反磁通瞬变电磁法，对包括高填方沉降渠段在内的约9 km渠段开展现场物理探测，研究了高填方沉降填筑体的二维等值反磁通瞬变电磁响应规律，检测结果表明，渠段地层的电性特征与地质钻孔情况相吻合，验证了OCTEM探测地层分布的可行性，为高填方渠堤沉降物探提供一种新的方法及思路，同时为沉降处置措施提供参考依据。更多还原

【Abstract】 The settlement of high fill canal levee directly affects the normal operation of water diversion project and the safety of water supply. The opposing coils transient electromagnetic method(OCTEM) has been widely used in shallow geophysical exploration because of its advantages such as small detection blind area, high resolution, high detection efficiency and strong stratification ability.In order to solve the problem of settlement acceleration in the high fill canal section of the middle route of the South-to-North Water Diversion Project, this study uses the opposing coils transient electromagnetic method to carry out on-site physical detection of about 9 kilometers of the canal section including the high fill settlement canal section, and studies the two-dimensional equivalent inverse magnetic flux transient electromagnetic response law of the high fill embankment settlement. The test results show that the electrical characteristics of the strata in the canal section are consistent with the geological drilling conditions. The feasibility of OCTEM detection of stratum distribution is verified, which provides a new method and idea for settlement geophysical exploration of high fill canal levee, and provides a reference for settlement disposal measures.更多还原